Boiler improver and fuel economizer



Sept. 7,1926. 1,599,062

-H. C. PAWSON BOILER IMPROVER AND FUEL ECONOMIZER Filed August 4, 1925 INVENTEIR Patented Sept. '7, 1926.

PATENT OFFICE.

' 'HERBERT c. .PAWSON, F TORONTO, ONTARIO, cANAnA, ASSIGNOR OF ONE-HALF '10.

- nLIAs E. sLAen AND s MUEL L. seems, BOTH or TORONTO, CANADA.

BOILER TMPROVER AND FUEL ECONOMIZER.

, Application med Au ust This invention relates toboiler improvers and fuel economizer's of the type in which fresh air is admitted into the combustion trated in the accompanying drawings in which- A I A Fig. 1 isa longitudinal section of a brick set boiler and furnace showing my improved device in position;

Fig. 2 a vertical section of my device on a larger scale; and A I s Fig. 3 a cross section on the line 3-3 in Fig. 2. I

In the drawings like numerals of reference indicate corresponding parts in the different figures.

1 is the brick settingof a boiler and furnace of ordinary type. In the rear wall, preferably at or about the level of the lower side of the boiler 2, isformed a rectangular opening in which is fitted the closed'rectangular casing 3 of suitable metal. The outer end 4: of the casing is formed as a removable cover and is provided with at each side a pivoted latch 5 adapted to engage the projections 6 inside the casing. When the cover is in position and these latches engaged, they cannot be disengaged exceptby the introduction of a suitable tool through the opening 7. The probability of the device being interfered with by incompetent or unauthorized persons is thus mini mized as the user will'seldom be aware of I the precise nature of the lock employed.

,An L-tube 8 is screwed into the opening 7 forming an air inlet for the device. At

the opposite end an elongated. air outlet opening 9 is provided, preferably opposite the opening 7. Adjacent the inner end,,but

spaced therefrom, is formed a diaphragm 10 which has openings 11 formed therein at its side remote from the outlet 9. In the casing are located a plurality of baflies 12, and these bafiies are all precisely similar and each one provided adjacent one edge 4, 1925. Serial No. 48,135.

with an opening 1 3. lVhen in position these baflies are positioned so that the openings 13 are alternately at opposite sides of the casing so that a zigzag passage is formed for the air entering the inlet opening 7. In practice all the openings, in cluding the inlet and outlet openings, are located at the top or bottom of the casing. Each baffle is provided with a plurality of rows of spaced fingers 14, preferably frustoconical in form. These fingers serve to space the bafiies from one another and from the diaphragm 10 so that the interior of the casing may be left smooth and free of project-ions These battles are positioned by dropping them one after the other into the casing with the openings 13 in the proper positions. The latches 5 are locked to prevent Outward displacement of the outer 'baflie 12. -These fingers become heated by conduction from the inner end of the casing, which is exposed to the flue gases,

of the heating system is much increased relative'to the amount of fuel burned, so much so that in some cases where the efficiency of the system has not been up to the required rating, by the use of my device it is possible to so increase the efficiency as to render the installation of a larger boiler unnecessary. The heat is held more steady and uniform, better combustion of the fuel is obtained leaving only a fine ash, and greater time may be taken between firing periods. I

The device, it will be noted, is" very compact and simple to manufacture and install. What I claim-is:' 7

1. A boiler improver and fuel economizer comprising a. rectangular casing adapted to be insertedfin an opening in the-rear wall of a boiler setting and having a transversely arranged air outlet at the lower side of its inner end; a removable closure for its outer end having an air inlet therein; an upright diaphragm located in and integral with the casing adjacent to but spaced from said inner end and having a plurality of small holes therein remote from the air outlet; and a plurality of batlies fitted within the casing to form a Zig-zag passageway tor the air and removable through the outer end of the casing.

2. A boiler improver and fuel eeonomizer comprising a rectangular casing adapted to he inserted in an opening in the rear wall of a boiler setting and having atransversely arranged air outlet at the lower side of its inner end tormedwith an inclined lower edge; a removable closure for its outer end having an air inlet therein; an upright diaphragm located in and integral with the easing adjacent to but spaced from said inner end and having a plurality of small holes therein remote from the air outlet; and a plurality of battles-fitted within the casing to form a zig-Zag passageway for the air and removable through the outer end of the casing.

3. A boiler improver and fuel economizer comprising a rectangular casing adapted to be inserted in an opening in the rearwa-ll ot a boiler setting and having a transversely arranged air outlet at the lower side of its inner end; a removable closure for its outer end having an air inlet therein at its lower side opposite the air outlet; an upright dil phragm located in and integral with the casing adjacent to but spaced from said inner end and having a plurality of small holes therein remote from the air outlet; and a plurality of battles fitted within the casing to form zig-zag passageway for the air and removable through the outer end of the casing.

Signed at Toronto, Canada, this 25th day of July 1925.

HERBERT C. PAlV-SON. 

